For any practical usefulness, the RTI values should be reasonably consistent
among detectors of the same model. In order to assess the consistency of the RTI
values among the detectors of the same model, seven sets of restorable detectors
(Types A–G) and four sets of non-restorable detectors (Types H–K) were tested
under test condition 3. For the restorable detectors, 10 series of tests were conducted.